Gas valve



Oct. 13, 1942.

' GAS vALy'E Filed April 18,1940

Index/ Z02 CizrZesCZawr c. c. LAMAR 2,298,771

Patented Oct. 13, 1942 U N l TE D- STAT E S PATENT OFFICE GAS VALVEporation of Illinois Application April 18, 1940, Serial No. 330,336

4 Claims. (Cl. 251-404) The present invention relates to valves and moreparticularly to gas valves intended for use with oven or other burnersof kitchen ranges.

Oven valves, are ordinarily constructed to control the supply of gas tothe burners and to a pilot burner. Some of these valves are of thehigh-low type, i. e., they are so constructed that when the valve isoperated to a certain position, gas is supplied to the burner at apredetermined low rate, and when operated to another position, gas issupplied to the burner at a maximum rate, In intermediate positions gasis supplied to the burner at rates dependent upon the setting of thevalve.

One of the primary objects of the present invention is the provision ofa high-low type valve wherein gas is supplied to the pilot atsubstantially constant pressure at all times that gas is supplied to theburner.

A further object of the present invention is the provisionof a new andimproved valve wherein gas is supplied at substantially constantpressure to the pilot prior to the time gas is supplied to the burner,as well as at all times that gas is supplied to the latter.

A further and important object of the present invention is the provisionof a new and improved plug type valve wherein all of the ports orpassageways, except the passageway leading to the burner, are located ina common plane perpendicular to the axis of the valve plug. The locationof the passageways in a common plane makes it possible to construct ashorter valve and to utilize a shorter valve plug, whereby a decidedreduction'in the cost of the valve is effected.

A further object of the present invention is the provision of a new andimproved valve wherein gas is supplied to the pilot at substantiallyconstant pressure in all positions of the valve in which gas is suppliedto the burner and wherein all the passageways, except the passagewayleading to the burner, are located in a common plane perpendicular tothe axis of the valve plug.

A further object of the present invention is the provision of a new andimproved valve of the high-low type wherein gas is supplied to the pilotat a substantially constant pressure in all positions of the valve inwhich gas is supplied to the burner, and wherein all the passageways,except the one leading to the burner, are located in a common planeperpendicular to the axis of the valve plug.

Other objects and advantages of the present invention will becomeapparent from the ensumg. description, in thecourseof which reference ishad to the accompanying drawing, in which:

Fig- 1 isan elevational view of a high-low type valve embodying thepresent invention;

Fig. 2 is an. enlarged sectional view through theplane of thepassageways (taken along the line 2-2 of Fig. 1) with the valve in itsclosed position;

Fig. 3 is a fragmentary sectional view of the valve shown in Figs. 1 and2 showing the valve in its low position;

. Fig. 4 is a view similar to Fig. 3 showing the valve with the valve inits fully open position;

Fig. 5 is a sectional view of a valve embodying the present inventionwhich valve, however, does not have a low adjustment; and.

Fig. 6 is a fragmentary sectional view of a valve of the type shown inFig. 5, illustrating a further modification of the present invention.

Referring now to the drawing and more particularly to Figs. 1 and 2, itmay be seen that the valve, which is indicated generally by thereference character I0, is a gas valve of the highlow type adaptedparticularly for use in broilers. The valve comprises a valve body I2,within which is mounted a control member illustrated as a rotatablymounted plug I4, provided with intercommunicating axial and radialpassageways I-6 and ll. The valve plug is illustrated in its offposition in Fig. 2, in its low position in Fig. 3, and in its fully openposition in Fig. 4. Variable amounts of gas are supplied to the broilerburner when the plug is operated to various angular positionsintermediate the positions occupied thereby in Figs. 3 and 4.

The valve plug is rotated by a handle 18 removably secured to'a valvestem 20 operatively connected in any suitable manner to the plug.

In accordance with one of the primary features of the present invention,the valve body I2 is formed with a plurality of radially extendingprojections or bosses 22, 24 and 26, all located in a common planedisposed transversely of the axis of rotation of plug I4. These bossesare drilled or otherwise formed with ports or passageways 28,, 30 and32, respectively, which define inlet, pilot and low adjustmentpassageways. The valve body is-also provided with a boss 34 which islocated coaxially with respect to plug I4 and is drilled or otherwiseprovided With a central passageway 35 communicating at one end with theaxial passageway 16 of the plug.

Gas is supplied to the burner and pilot under the control of the valvethrough the inlet passageway 28 from a suitable supply conduit (notshown) which may be secured to the externally threaded boss 22.

Gas is supplied to the pilot in a manner to be described shortly througha conduit 36 connected to the pilot passageway 30 by a coupling member38 and a T-connection 40, provided with a rotatable adjusting valve 42by means of which the supply of gas to the pilot may be adjusted. TheT-connection is preferably threaded into the internally threaded pilotboss 24.

Gas is supplied to the burner through the outlet passageway 35 in theoutlet boss 34, which is externally threaded to receive a couplingmember 54 and conduit #16.

The low adjustment comprises a needle valve 48 adjustably mounted in thelow adjustment boss 26. The desired adjustability of the needle valve ispreferably obtained by providing it with external threads so that it maybe threaded into the internal threads provided on the boss 26. Undesiredaccess to and adjustment of the needle valve is prevented by a cap 50threaded internally so that it may be secured to boss 26. A bushing 52is provided to prevent leakage.

The low adjustment passageway 32 communicates with inlet passageway 28through a passageway M, which may conveniently be termed an auxiliarypassageway. In passing it may be noted that the passageway 32 terminatesin a portion 56 of reduced diameter leading to the valve plug.

According to another important feature of the present invention, gas issupplied to the pilot at constant pressure Whenever gas is supplied tothe burner, irrespective of whether the valve plug is in its low, high,or any of its intermediate positions. This is achieved by providing thevalve plug M with a peripheral groove or passageway 58 adapted toconnect the inlet passageway 28 to the pilot passageway 3%] in all theabove mentioned positions of the valve plug through auxiliarypassageways 60 and 62.

The peripheral passageway, like all the other passageways leading to theperipheral surface of the valve plug are all in the same planetransverse to the axis of rotation of the plug. This location of thepassageways is another of the important features of the presentinvention as it makes possible the construction of a shorter valve bodyand valve plug, whereby a reduction in cost of the valve is effected.

Another advantage of the construction illustrated in Figs. 1 to 4 anddescribed above is that the auxiliary passageways 54, 60 and 62 may bedrilled through the low adjustment, inlet and pilot passageways 32, 28and 30, respectively, as may be apparent from an inspection of Fig. 2.Another advantage of the illustrated and described valve construction isthat the same valve body may be utilized, irrespective of the directionin which the valve plug is to be rotated to suppl as to the burner. Inthe illustrated em bodiment, the valve plug 14 is rotated in acounterclockwise direction (referring to Fig. 2) when it is desired tosupply gas to the burner. If it is desired for any reason whatever torotate the valve plug in the opposite direction, then the boss 24 wouldbe constructed like boss 26, and the latter like the former. In casethis is done, then the location of the auxiliary passageways and theperipheral passageway in the valve plug would have to be changedaccordingly.

When the valve is in its off position, as illustrated in Fig. 2, it maybe noted that the supply of gas to the outlet conduit 46, which leads togees hi the burner as heretofore indicated, and to the pilot conduit 36,is cut off by reason of the fact that the valve plug I4 occupies aposition wherein passageways l6 and 30 are cut off from communicationwith inlet passageway 28.

When the valve is in its low position, as illustrated in Fig. 3, gas issupplied to the pilot at constant pressure through the inlet passageway28, auxiliary passageway 60, the peripheral passageway 58 in plug I4,auxiliary passageway 62, pilot passageway 30, T-connection 4i) andconduit 36. Gas is also supplied to the burner, at a rate dependent uponthe setting of needle valve 48, through the inlet passageway 28,auxiliary passageway 53, low adjustment passageways 32, 56, radial andaxial passageways I1 and It in plug [4, the outlet passageway 35 andburner conduit 46. In the embodiment of Figs. 1 to 4, gas is supplied tothe pilot at substantially the same time as it is supplied to the burnerby reason of the fact that the passageway 62 is connected to the inletat the same time that passageway I1 is connected to passageway 56.

When the valve is in its high position, as illustrated in Fig. 4, gas issupplied to the burner at a maximum rate through inlet passageway 28,the radial and axial passageways I! and iii of the plug and outletpassageway 35. Gas is supplied at the same constant pressure aspreviously to the pilot through the passageways previously indicated,the peripheral passageway 58 in the plug being of a length sufiicient toconnect passageways 60 and 62 in the low and high positions, as Well asin all positions of the valve plug intermediate the low and highpositions.

The features of the present invention described above are alsoapplicable to oven valves of the type having no low adjustment, asillustrated in Fig. 5. Referring now to this figure, the valve isindicated generally by reference character HI. It comprises a body 72within which is mounted a rotatable plug 14 provided with a radialpassageway l6 communicating with an axial passageway l8, communicatingin turn with the burner, just as in the previously described embodiment.The plug is provided also with a peripheral passageway of a length andso located angularly that gas is supplied to the burner and pilot atsubstantially the same time as the valve is moved from its closed toopen positions. Gas is supplied to the burner through an inletpassageway 82 extending through a radial boss 84 and the previouslymentioned passageways T6 and 18 in the plug and is supplied to the pilotat the same time and also at constant pressure through the inletpassageway 82, an auxiliary passageway 86 leading from the latter to thevalve plug, and an auxiliary passageway 88 leading to the pilotpassageway 90 extending through a radial boss 92. The latter isinternally threaded to receive a T-connection 94 which may be and whichis illustrated as being similar to the T-connection 40 of the previouslydescribed modification.

The radial bosses 84 and 92 are located in the same plane transverse tothe axis of rotation of valve plug 14.

The principles of the present invention can be utilized to provide avalve operable to supply gas to the pilot prior to the time that gas issupplied to the burner. A valve of this nature is shown in Fig. 6. Thevalve illustrated in this figure is identical with the one illustratedin Fig. 5, with the exception thatthe peripheral passageway 9B in thevalve plug 98 is made some what longer than the passageway 80 so thatgas is supplied to the pilot passageway 90 prior to the time that gas issupplied to the burner through passageways l6 and 18.

It should be understood that the principles of the present invention maybe utilized in connection with valves of different forms and sizes andthat while the invention has been described in conjunction with certainpreferred embodiments, these are deemed to be illustrative only.

I claim:

1. In a valve of the type comprising a body apertured to receive arotatable control member operable to control the supply of a fluidmedium, said control member being provided with a central axialpassageway and a radial passageway for controlling the supply of themedium to a burner, an inlet passageway, a passageway adapted to beconnected to a pilot burner and communicating with the control member ata point angularly displaced in one direction from said inlet passageway,and a low adjustment passageway providing communication between theinlet passageway and control member at a point angularly displaced inthe opposite direction from said inlet passageway through which apredetermined amount of flui medium flows when the control member isoperated to a predetermined position, including in combination, anauxiliary passageway leading from said inlet passageway to the controlmember at a point between said inlet and pilot passageways, and apassageway in said control member spaced from the axial and radialpassageways therein, said pilot, auxiliary and last mentionedpassageways being so constructed and located angularly with respect toeach other and the inlet, the low adjustment and the radial and axialpassageways that gas is supplied to the pilot burner at a substantiallyconstant pressure whenever gas is supplied to the burner.

2. In a valve of the type comprising a body apertured to receive arotatable control member operable to control the supply of a fluidmedium, said control member being provided with central axialpassageways and a radial passageway for controlling the supply of themedium to a burner, an inlet passageway, a passageway adapted to beconnected to a pilot burner and communicating with the control member ata point angularly displaced in one direction from said inlet passageway,and a low adjustment passageway providing communication between theinlet passageway and control member at a point angularly displaced inthe opposite direction from said inlet passageway through which apredetermined amount of fluid medium flows when the control member isoperated to a predetermined position, including in combination, anauxiliary passageway leading from said inlet passageway to the controlmember at a point between said inlet and pilot passageways, and apassageway in said control member spaced from the axial and radialpassageways therein, said pilot, auxiliary and last mentionedpassageways being so constructed and located angularly with respect toeach other and the inlet, the low adjustment and the radial and axialpassageways that gas is supplied to the pilot burner at a substantiallyconstant pressure whenever gas is supplied to the burner, all saidpassageways, with the exception of the axial passageway in said controlmember, being 10- cat-ed in a common plane transverse to the axis ofrotation of said control member.

3. In a gas valve of the character described, the combination including,a passageway for supplying a relatively small quantity of gas to aburner, a passageway for supplying. a larger quantity of gas to theburner, a passageway for supplying gas to a pilot for said burner, aninlet passageway for supplying gas to the valve, and control means soconstructed and arranged with respect to said passageways that the inletpassageway is connected to said pilot passageway with th connection ofsaid inlet passageway to said first mentioned passageway and remainsconnected to said pilot passageway to supply gas at a substantiallyconstant pressure thereto while the burner passageway is connected toeither of the two first mentioned passageways.

4. In a gas valve of the character described, the combination including,a passageway for supplying a predetermined relatively small quantity ofgas to a burner, a passageway for supplying a predetermined largerquantity of gas to the burner, control means associated with saidpassageways operable to a first position to supply said small quantityto the burner and to a second position to supply said larger quantity tosaid burner, said control means being operable also to supply variableamounts of gas to the burner in positions intermediate said first andsecond positions, a pilot passageway, said pilot passageway and controlmeans being so constructed and arranged that gas is supplied to thepilot passageway at a substantially constant pressure in all saidpositions of the control means.

CHARLES C. LAMAR.

